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post #1 of 101 (permalink) Old August 24th, 2010, 16:29 Thread Starter
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Another UK V8 MR2 Conversion

V8 ... The Beginning!

Some of you may know me from over on MR2OC.co.uk and TwoBrutal. I've spent the past year building my V6 MR2 which after many a setback is in the final stages of having a TRD Scion Supercharger fitted. I have designed the bracket to fit it to the block myself and am nearly there with that. By all means take a look

This car is all but done, fully resprayed, polybushed, HSD's, full leather retrim, Speedhuts, Enkei's etc.



I've suffered con-rod bearing failure, then in prep for the SC i fitted Copper headgaskets that Boostedcamry helped me with (Gabe) .... big mistake!! They're notoriously difficult to seal and lasted 600 mile before leaking - that's with ARP's....! I now have 3vz MLS gaskets ready to fit supplied to me from Rogue Motorsport - if you're interested in a set, contact Patrick

http://www.mr2oc.co.uk/forums/125/118180.html

Anyway i had been doing a complete nut and bolt rebuild on my 93 JDM turbo also but due to personal problems my heart is no longer in the car. Just before it fell off axle stands it looked something like this...




and the engine detailed to this standard



The turbo engine will be sold off to part pay for this build but have started parts collection already.

Justinswidebody's progress has spurred me on to make a start.

So far i have bought a Link G4 Extreme ECU - supremely good bit of kit which i hope 2BarTuning will help with

Just waiting on delivery of my gearbox, flywheel, clutch and driveshafts from an Audi 2.5tdi 6-speed
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post #2 of 101 (permalink) Old August 24th, 2010, 16:33 Thread Starter
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Delivery of the engine was a week ago and unwrapped it today (like a kid in a candyshop). It's a 2002 54k miles 4.3litre Lexus 3UZ-FE. Complete with A/C pump, starter, alternator etc etc







Finally, no point going quick without being able to stop. So have bought a full set of Porsche 996/Boxster Brembo calipers



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post #3 of 101 (permalink) Old August 24th, 2010, 16:34 Thread Starter
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Wheel wise will see some seriously wide VS-XX 18" action. with 9s on the front and 11s on the rear!





The purist in me, hence going the Toyota engine route, is dictating that i do a full-on MC8R style car including rear chassis stretch.

Progress will be a little slow to start with as i have the headgaskets to swap on the V6 along with completing another V6 swap for a friend.

Last edited by dgh938peg; August 25th, 2010 at 02:20.
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post #4 of 101 (permalink) Old August 24th, 2010, 16:34
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So, wheres the V8?

EDIT, posted that second post while i was posting.
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post #5 of 101 (permalink) Old August 24th, 2010, 22:28
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Can't wait to see this take off. Glad i could give someone some inspiration. If you need any help with anything let me know.
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post #6 of 101 (permalink) Old September 4th, 2010, 01:52
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what transaxle are you planning on using? what adaptor? clutch/flywheel? Axles?
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post #7 of 101 (permalink) Old September 4th, 2010, 15:42 Thread Starter
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Hi Chris,

I have the Audi 01x 6-speed transmission the same as Pauls. I've also got the driveshafts, dual mass flywheeel and clutch - all in excellent condition. .... To keep things simple, i'll make an adapter/spacer to fit between the Audi flywheel and the 3UZ starter gearwheel.

More pics to come.

Have now also got on order RX8 front discs for the rear - these are 323mm OD x 24mm thick and will be stopped with the Porsche rear calipers. For the front i have a massive set of Supra discs on alloy bells. These are 330mm OD x 30mm thick.

Fronts;
http://cgi.ebay.co.uk/ws/eBayISAPI.d...=STRK:MEWNX:IT

So leaves me with a handbrake issue. In the UK the braking circuit cannot be used for the parking brake - this must be mechanical. So have a set of Wilwood Mechanical Spot Calipers.



They're sed quite a bit on Astons, Jags and alike so should to do the job no problem

For the axles, it stands to reason that if Paul's Audi Axles fit the MR2 hubs then these should as well on mine. If not i'll have custom hub centres machined...

To fit the gearbox onto the engine, i'll make (2) plates from aluminium, (1) to fit the engine and (1) to fit the box then centre them up and weld together.

Last edited by dgh938peg; September 4th, 2010 at 15:47.
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post #8 of 101 (permalink) Old September 4th, 2010, 20:54
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In my case, I had custom axles machined. They are GM spline on one end (since I am using a GM transaxle with GM CV joints), and Toyota MR2 turbo on the other end to fit the MR2 turbo CV outer joints. I suggest that as being the simplest route. I had them made from 300M and they were heat treated to a pretty hard specification.

I think Paul welded axles together: 1/2 MR2 and 1/2 Audi.

Someone contacted me recently and gave me a Audi transaxle bellhousing bolt pattern drawing. Let me know if you want it. You are going to need a custom adaptor for the engine to trans, and you may need a spacer for the flywheel. In my case, I have to make my existing aluminum flywheel thicker.
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post #9 of 101 (permalink) Old September 5th, 2010, 08:47 Thread Starter
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Quote:
Originally Posted by cbulen
In my case, I had custom axles machined. They are GM spline on one end (since I am using a GM transaxle with GM CV joints), and Toyota MR2 turbo on the other end to fit the MR2 turbo CV outer joints. I suggest that as being the simplest route. I had them made from 300M and they were heat treated to a pretty hard specification.

I think Paul welded axles together: 1/2 MR2 and 1/2 Audi.

Someone contacted me recently and gave me a Audi transaxle bellhousing bolt pattern drawing. Let me know if you want it. You are going to need a custom adaptor for the engine to trans, and you may need a spacer for the flywheel. In my case, I have to make my existing aluminum flywheel thicker.
Paul's are hybrids using the Audi inner CV & shaft that fortunately fit the MR2 outer CV - sppoky! As he said at the time cross-fitting parts from different manufacturers is extremely rare!

Having seen and heard Paul's car in the flesh, all i can say is the videos don't do the noise it makes justice!!

Yes mate - would love the Audi Bellhousing pattern and will shoot you a pm with my email addy. I'll do you a trade too, once i have the 3UZ flange drawn i'll ping it across to you
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post #10 of 101 (permalink) Old September 6th, 2010, 01:23
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I only had to weld one shaft, one of the audi shafts was the correct length when fitted to the opposite side it would normally be on.

Dan if your car has turbo hubs, it was a turbo wasn't it? Then believe it or not a Mk2 turbo outer CV joint will fit straight onto the audi shaft, if you have NA hubs then a Gt4 outer CV joint is the one you need, but if you can use the turbo outer CV it solves all of your ABS issues too (if fitted).

A Mk2 has a 10mm wider track than a Mk1, so you will find your driveshaft set up will be identical to mine (my inner CV joints have 20mm of endfloat in either direction) , how you modify the one shaft that needs shortening is up to you, i have tried to break my welded one and so far it remains intact, i'm going to continue trying to break something until the car sees the road


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post #11 of 101 (permalink) Old September 12th, 2010, 11:00
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How do you plan on mounting the Porsche calipers? Just curious because I'd like to put Evo Brembos on my car and I'm sure they will be a similar process.
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post #12 of 101 (permalink) Old September 13th, 2010, 03:40 Thread Starter
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It's not all that hard drift, you just have to make custom brackets up to fit between the MR2 mountings and the Porsche calipers. Paul Woods has already done the Porsche/Brembo fronts on his mk1 so it's nothing new really.
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post #13 of 101 (permalink) Old October 7th, 2010, 05:40 Thread Starter
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Little update time...

Been looking at the MC8-R dimensionally and after a sketch i'd posted on Justin's page a friend sent me this...

http://www.cardomain.com/ride/460730

So wheelbase being the important one which i am happy with i have near enough right. As does Justin i might add.

SUBFRAME

It is my intention to make the engine, gearbox and rear suspension drop from the car as one complete unit. this will make it far easier to work on if needed. Though i have no plans to have it in and out all the time lol! I sketched this a while back and think is a pretty workable solution as a basis. There will probably be other tie-in points and triangulation for added strength & rigidity.



A= 3UZ engine mounts
B= New gearbox mounts
C= Chassis mounts (near original MR2 mount positions)
D= Ties to cabin rear crossmember
E= 93+ subframe with mod for gearbox

These are the front discs to go in the Porsche 996 Calipers. They measure 324mm dia x 30mm thick (compared to the 330x34 on the porsche disc). They're from a mk4 Supra TT so a straight fit onto the MR2. Saw this as a much easier method than trying to get 996 discs modded to fit.



Ok, not for right now, it is my intention to get this car running for next summer/autumn but could not resist a bargain. These bits will be future mods next winter. What you see here is a pair of Jag XKR chargecooler head along with a Jag/Eaton M112 4th gen supercharger. It has the teflon coated rotors and is completely unused. Paid less than ?400 for the lot.

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post #14 of 101 (permalink) Old October 29th, 2010, 17:46
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Dgh, When you get into this, If you want, I would be more than willing to cut and build your subframe back for you how mine is. If it would help you out at all that is.

Justin
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post #15 of 101 (permalink) Old October 29th, 2010, 19:28
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im looking forword to yet another v8 mr2 build.
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post #16 of 101 (permalink) Old October 30th, 2010, 00:28
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what are we looking at HP wise? just kinda wondering
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post #17 of 101 (permalink) Old November 2nd, 2010, 22:18
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What is the weight distribution with V8 set up?
Is there a weight penalty over the 3SGTE?
With the Audi gearbox, will the rear wheel be extended to the rear of the car or will it still work in the standard wheel base?
Well done on taking on such a project. Best of luck
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post #18 of 101 (permalink) Old November 7th, 2010, 17:32 Thread Starter
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@ Square - cheers buddy. Should be on this like cheap perfume on a hooker come January time - gotta finish the V6 first.

@ staci - Unsure really. The stock 3uz churns out 300hp with restrictive cats and a weak fuel map. I shall be running a Link G4 Extreme for starters on pretty free-flowing cat-less exhausts. I would dare say that'll see me to 320-330 ish. The charger can wait.

@ B24nsw - The V8 is way lighter than the 3sgte buddy. The box is about the same as the gte unit weight wise too (about the 55kg mark). So all in all i am hoping to gain no more than 50kg. It will all depend on if i go to fibreglass rear 1/4 panels or not.

As for wheelbase; my plan is to extend the car wheelbase by about 380-400mm. But only lengthening the car a small percentage of that. Say around 150mm. It must be in similar proportions with the Sard MC8-R

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post #19 of 101 (permalink) Old February 17th, 2011, 15:41 Thread Starter
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Still collecting parts unfortunately.

The V6 is being pulled out in the next week or two to undergo a total transformation visually and performance-wise. Once i have that back in i'll be in the V8.

Have bought;

- Twin Walbro 255lph fuel pumps
- Bosch Chargecooler pump
- Fiat Seicento Rad (for CC system)
- CC piping
- Hilux Surf 1 1/16" Brake Master Cylinder
- Speedhuts
- Wideband sensor & gauge

So a few months behind schedule already and i haven't even started! Had a nightmare of a bathroom refit that has really wiped me out!
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post #20 of 101 (permalink) Old February 3rd, 2012, 07:00 Thread Starter
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Desperately trying to get my V6SC complete so i can start on this.. I'll get there in the end - in the meantime am still collecting parts.

Just bought a Mishimoto Rad with twin 12" fans to keep it all cool up front

And sorted out part of the traction problem. My concern being just lighting up a wheel mid corner or something like that. So having used the turbo hubs on the V6 now. I have bought a set of Turbo hubs and shafts with ABS sensors. This i will hook up to a racelogic traction control system (also on order).

And the final part in the no loss of traction equation is the wheels. I have a set of 18" Work VS-XX alloys from when this car was a turbo re-build. These were ET50 (thankfully) 8's and 9's. The reason i say thankfully to a 50 offset is that i will need that to clear the porsche calipers and keep offsets sensible - using a 15mm hubcentric spacer.

Seeing as this is going all wide arch - i didn't fancy sticking with 8s and 9s. so... now i will have 9's up front (ET20) and 11's on the back (ET-5) allowing for the spacers in this.

I ordered these new outers yesterday - 5" deep....


this sees me to 9J on the front (ET+20) and 11J on the rear (ET-5) .... happy as a pig in poo!
Just means i can get the wheels built back up and not have the parts kicking about. I have all new nuts from Titanium Touch to go with the original WORK stainless steel bolts...

A quick reminder
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